Photoprocesses in Guest-Host Complexes of a Styryl Dye Thio Derivative with Cucurbiturils

被引：1

作者：

Svirida, A. D. ^{[1
]}

Ivanov, D. A. ^{[1
]}

Kryukov, I. V. ^{[1
]}

Petrov, N. Kh. ^{[1
]}

Aleksandrova, N. A. ^{[1
]}

Avakyan, V. G. ^{[1
]}

Gromov, S. P. ^{[1
,2
]}

机构：

[1] Russian Acad Sci, Photochem Ctr, Fed Res Ctr Crystallog & Photon, Moscow 119421, Russia

[2] Moscow MV Lomonosov State Univ, Fac Chem, Moscow 119991, Russia

来源：

HIGH ENERGY CHEMISTRY | 2023年 / 57卷 / 02期

基金：

俄罗斯科学基金会;

关键词：

guest-host complexes; styryl dyes; cucurbiturils; picosecond fluorescence spectroscopy; quantum-chemical calculations; FLUORESCENCE;

D O I：

10.1134/S0018143923020145

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Photoprocesses in aqueous solutions of the styryl dye 1-ethyl-4-{(E)-2-[4(methylthio)phenyl]vinyl}pyridinium perchlorate (1) and its complexes with cucurbit[n]urils (CB[n], n = 6-8) have been studied using the methods of stationary and time-resolved optical spectroscopy. The fluorescence intensity increases by approximately 3 times in 1 : 1 complexes of 1 and CB[6], whereas CB[7] has almost no effect on the fluorescence intensity. In 2 : 1 complexes with CB[8], the photocycloaddition reaction does not occur, with strong fluorescence quenching being associated with the formation of nonreactive dimers. The fluorescence decay kinetics of 1 has two characteristic times, 1.4 and similar to 130 ps, and changes little in the complexes. The photoinduced intramolecular charge transfer in 1 is an order of magnitude smaller than in the well-known dye DASPI.

引用

页码：109 / 115

页数：7

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